WorksheetsCardiac Cycle and Conduction
Total questions: 15
Worksheet time: 15mins
What is the definition of the Cardiac Cycle?
the contraction of the atria
the sequence of events that occur during one complete heartbeat
the contraction and relaxation of the ventricles
the circulation of blood in the heart
What is the sequence of events in the transmission of an impulse through the heart muscle?
d, b, a, c, f, g, e
c, d, a, b, f, g, e
b, a, d, c, f, g, e
f, g, d, c, b, a, e
The pacemaker of the heart is also known as the....
AV node
SA node
Purkinje fibres
Bundle of His
The emptying of the atria (contraction) is controlled by the:
SA node
AV node
Purkinje fibres
Bundle of His
The AV node is located at...
A
B
C
D
Order the phases an action potential travels in the conduction system
SA node--> AV bundle branches--> AV node--> Purkinje fibers
SA node--> AV node--> AV bundle branches--> Purkinje fibers
Av bundle branches--> AV node--> SA node--> Purkinje fibers
Purkinje fibers--> SA node--> AV node--> AV bundle branches
Why are the walls of the left ventricle thicker than that of the right ventricle?
The left ventricle must force blood into all the capillaries of the lungs
the left ventricle doesn't skip leg day
This is false, the walls of the right ventricle are thicker
Blood from the left ventricle is pumped throught the entire body
What number represents the aorta?
1
2
3
4
8
which part of the brain controls heart rate/the SAN?
hippocampus
medulla oblongata
amygdala
ventral striatum
The _____ nerve decreases heart rate.
accelerans
vagus
sino atrial
atrio ventricular
Where does blood go after it leaves number 9?
(a)
what is B
atriole systole
first phase of ventricular systole
second phase of ventricular systole
early ventricular diastole
late ventricular diastole
What is the primary function of the atrioventricular (AV) node in the cardiac conduction system?
To initiate the heartbeat
To delay the impulse before it passes to the ventricles
To directly stimulate the contraction of the ventricles
To act as the primary pacemaker of the heart
During which phase of the cardiac cycle does the heart muscle relax and the chambers fill with blood?
Systole
Diastole
Isovolumetric contraction
Isovolumetric relaxation
Which of the following best describes the role of Purkinje fibers in the cardiac conduction system?
They initiate the electrical impulse in the heart
They delay the impulse to allow atrial contraction
They conduct the impulse rapidly to the ventricles
They act as a backup pacemaker
